A green roof assembly consists of components designed to support the horticulture as well as components to help perform the traditional functions on a roof – waterproofing and channeling excess water towards the drains. These layers are identified as:

The Roof Deck with insulation and waterproofing
Protection and moisture storage layer
Drainage Layer
Filter Layer
Growing Media
Green Roof Plants
These components work together as a system to perform all the functions of a green roof: waterproofing, drainage, water retention, evapotranspiration and supporting the growth of the plants. Proper design and specification of each component is critical to ensuring the system as a whole performs properly.

"To keep my office lower with fire risks, I hired some professional green roof contractors. One of them told me that plants naturally contain a lot of moisture. With a green roof, you can create a natural fire-resistant layer on your house or office building. That sounds good to go.

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